In this encore presentation of Eavesdrop on Experts, environmental psychologist Dr Wouter Poortinga shares how the 5p plastic bag tax in the UK reduced consumption between 70 and 90 percent almost overnight. He discusses how, with a little bit of prompting, habits can change and how we need a plan to stop wasting take-away coffee cups.

Episode recorded: 8 February, 2017

Interviewer: Steve Grimwade

Producers: Dr Andi Horvath and Chris Hatzis

Audio Engineering: Gavin Nebauer

Editor: Chris Hatzis

Banner image: Claudia Hooper and Lep Beljac